FläktGroup EQRF Ecoterm Installation and Maintenance Manual

Brand: FläktGroup

Model: EQRF Ecoterm

Type: Installation and Maintenance Manual

FläktGroup DC_8656GB 20180122_R0 We reserve the right to make changes without prior notice

Insertion sensor

(not included)

Draining, Size 8 connection

(female thread)

Nipple for air

purging

Connections to the pipework should be made by the pipework con-

tractor.Connect the finnedheat exchanger to the pipework in such

amanner that expansion forces or thedeadweight of the pipework

will not be applied to the liquid connections.

The liquid connections are provided with identification plates for

the inlet and outlet.

Caution!

Use a pipe wrench to restrain the pipe

connections of the heat exchanger when

tightening the external pipe connections.

For output variant 6-9, there is two coils in each air stream. These

coils are connected in series in which 2 must be connected to 2

on each coil. The water is connected in counterflow air direction as

shown below.

ANTI-FREEZE PROTECTION

Some form of anti-freeze monitor should be used to protect the

finned heat exchangers against the risk of damage by freezing if

the heat exchanger is used for outdoor air.All finnedheat exchan-

gers can be equipped with surface type or insertion type sensors.

The location of the insertion sensor should be in accordance with

the instruction plate on the side of the unit section.

+/- +/-

EQRF LIQUID COUPLED HEAT

EXCHANGERS

INSTALLATION AND MAINTENANCE INSTRUCTION

FläktGroup DC_8656GB 20180122_R0 We reserve the right to make changes without prior notice

PURGING THE FINNED HEAT EXCHANGERS OF AIR

Purging can be purged of air either automatically or manually.

MEASURES TO BE TAKEN IF THERE IS RISK OF FREEZING

If the water in a coil should freeze, the coil will burst. This will allow the

water to run out of the system, which may causewater damage.

Freezing is likely to occur in ventilation systemsunder the following

conditions at low outdoor air temperatures:

1. The temperature of the heatingmediumis too low

The temperature of the heating medium is too low Freezing is

especially likely to occur in the autumn and in the spring. Adjust

the water temperature to suit the outdoor air temperature.

2. The finned heat exchanger is oversized

Set the water temperature to a lower setting so that the water

flow will increase.

3. Theheat supplytothe airheater ceasesor is reduced

If the supply of heat to the air heater is expected to cease or be

significantly reduced, the outdoor air intakemust then be adequately

closed and all the fans must be stopped.

EQAZ-18

Manual

air purging

valve

EQAZ-19 Automatic

air purging valve

NOTE!

If the heat supply has ceased or decreased,

open the air recirculation damper.

The pressure in the premises may then drop

to sub-atmospheric value, even though

the fans are not running.

Outdoor air will then be drawn through

the unit and may cause freezing and con-

sequent bursting.

The anti-freeze protection must not be

adjusted to such a low temperature that

freezing is likely to occur.

If the building is left unheated for a longer

period of time in the winter, the water must

be drained from both the pipework and

the heat exchangers.

Don't refit the plugs to the heat exchangers

before the systems is to be refilled with

water. Tomake certain that the heat exhanger

is completely drained of water, blow com-

pressed air through it.

DRAINAGE

The heat exchanger cannot be drained completely. Antifreeze must

therefore be added to the liquid if there is risk of freezing.

FINS

Use the QLAZ-14-1 fin comb to straighten any deformed fins.

QLAZ-14-1 fin comb

Caution!

To avoid injuries, wear protective gloves

wheneverworkingwith the fin comb.

CONDENSATE DRAINAGE FOR THE EQRF

The finned heat exchangers are provided with 32 mm dia. drain

connections for connection to a water trap with a depth of at least

150 mm. Preferably use the EQAZ-08water trap (see separate

instruction).

Watertrap EQAZ-08-1

Under atmospheric Above atmospheric

Watertrap EQAZ-08-2

FläktGroup EQRF Ecoterm Installation and Maintenance Manual

FläktGroup EQRF Ecoterm Installation and Maintenance Manual

FläktGroup EQRF Ecoterm Installation and Maintenance Manual

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